Its low approach speed, combined with steep climbs and descents, would make it inaudible outside the airport.
凭借低缓的进场速度以及急剧升降的性能，飞机的声响不会传到机场之外。
Photocatalytic effect is better at higher Initial toluene concentration and moderate and low approach air velocity.
较高的甲苯初始浓度和中低迎面风速下光催化效果较好。
Photocatalytic effect is better at higher Initial toluene concentration and moderate and low approach air velocity.
较高的甲苯初始浓度和中低迎面风速下光催化效果较好。
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